120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
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/*!
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* @file Adafruit_MPR121.h
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*
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* This is a library for the MPR121 12-Channel Capacitive Sensor
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*
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* Designed specifically to work with the MPR121 board.
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*
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* Pick one up today in the adafruit shop!
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* ------> https://www.adafruit.com/product/1982
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*
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* These sensors use I2C to communicate, 2+ pins are required to interface
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*
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* Adafruit invests time and resources providing this open source code,
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* please support Adafruit andopen-source hardware by purchasing products
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* from Adafruit!
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*
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* Limor Fried/Ladyada (Adafruit Industries).
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*
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* BSD license, all text above must be included in any redistribution
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*/
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#ifndef ADAFRUIT_MPR121_H
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#define ADAFRUIT_MPR121_H
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#include "Arduino.h"
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#include <Adafruit_BusIO_Register.h>
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#include <Adafruit_I2CDevice.h>
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// The default I2C address
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#define MPR121_I2CADDR_DEFAULT 0x5A ///< default I2C address
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#define MPR121_TOUCH_THRESHOLD_DEFAULT 12 ///< default touch threshold value
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#define MPR121_RELEASE_THRESHOLD_DEFAULT 6 ///< default relese threshold value
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/*!
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* Device register map
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*/
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enum {
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MPR121_TOUCHSTATUS_L = 0x00,
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MPR121_TOUCHSTATUS_H = 0x01,
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MPR121_STATUS_L = 0x02,
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MPR121_STATUS_H = 0x03,
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MPR121_FILTDATA_0L = 0x04,
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MPR121_FILTDATA_0H = 0x05,
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MPR121_BASELINE_0 = 0x1E,
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MPR121_MHDR = 0x2B,
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MPR121_NHDR = 0x2C,
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MPR121_NCLR = 0x2D,
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MPR121_FDLR = 0x2E,
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MPR121_MHDF = 0x2F,
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MPR121_NHDF = 0x30,
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MPR121_NCLF = 0x31,
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MPR121_FDLF = 0x32,
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MPR121_NHDT = 0x33,
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MPR121_NCLT = 0x34,
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MPR121_FDLT = 0x35,
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MPR121_TOUCHTH_0 = 0x41,
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MPR121_RELEASETH_0 = 0x42,
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MPR121_DEBOUNCE = 0x5B,
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MPR121_CONFIG1 = 0x5C,
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MPR121_CONFIG2 = 0x5D,
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MPR121_CHARGECURR_0 = 0x5F,
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MPR121_CHARGETIME_1 = 0x6C,
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MPR121_ECR = 0x5E,
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MPR121_AUTOCONFIG0 = 0x7B,
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MPR121_AUTOCONFIG1 = 0x7C,
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MPR121_UPLIMIT = 0x7D,
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MPR121_LOWLIMIT = 0x7E,
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MPR121_TARGETLIMIT = 0x7F,
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MPR121_GPIODIR = 0x76,
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MPR121_GPIOEN = 0x77,
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MPR121_GPIOSET = 0x78,
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MPR121_GPIOCLR = 0x79,
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MPR121_GPIOTOGGLE = 0x7A,
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MPR121_SOFTRESET = 0x80,
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};
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//.. thru to 0x1C/0x1D
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/*!
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* @brief Class that stores state and functions for interacting with MPR121
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* proximity capacitive touch sensor controller.
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*/
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class Adafruit_MPR121 {
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public:
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// Hardware I2C
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Adafruit_MPR121();
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bool begin(uint8_t sensibility5C, uint8_t sensibility5D,
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uint8_t i2caddr = MPR121_I2CADDR_DEFAULT,
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TwoWire *theWire = &Wire,
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uint8_t touchThreshold = MPR121_TOUCH_THRESHOLD_DEFAULT,
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uint8_t releaseThreshold = MPR121_RELEASE_THRESHOLD_DEFAULT);
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uint16_t filteredData(uint8_t t);
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uint16_t baselineData(uint8_t t);
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uint8_t readRegister8(uint8_t reg);
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uint16_t readRegister16(uint8_t reg);
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void writeRegister(uint8_t reg, uint8_t value);
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uint16_t touched(void);
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// Add deprecated attribute so that the compiler shows a warning
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void setThreshholds(uint8_t touch, uint8_t release)
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__attribute__((deprecated));
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void setThresholds(uint8_t touch, uint8_t release);
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// Function that checks if any of the sensors went our of rance
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bool wentOutOfRange();
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// Function that checks if any of the sensors had an overcurrent
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bool hadOverCurrent(uid_t touched);
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private:
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Adafruit_I2CDevice *i2c_dev = NULL;
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};
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#endif
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